1 单选 已知两个同方向的简谐振动_(1)=2cos (1001pi t+dfrac (pi )(3)) __， _(1)=2cos (1001pi t+dfrac (pi )(3)) __，则这两个振动合成后的拍频 =_______ _(1)=2cos (1001pi t+dfrac (pi )(3)) __A 0.5B 2001C 1D _(1)=2cos (1001pi t+dfrac (pi )(3)) __

【题目】某质点参与 _(1)=5cos (pi t-dfrac (pi )(2))cm 及-|||-_(2)=5cos (pi t+dfrac (pi )(2)

某质点参与_(1)=10cos (pi t-dfrac (pi )(2))cm 及 _(2)=20cos (pi t+dfrac (pi )(2))cm两个同方

已知两个同方向、同频率的简谐运动的运动的方程分别为： _(1)=0.06cos (2pi t+dfrac (pi )(3))(m) , _(1)=0.06cos

32-5 一物体同时参与两个同方向的简谐振动:-|||-_(1)=0.04cos (2pi t+dfrac (1)(2)pi ) (SI单位), _(2)=0.

两个同方向简谐振动的振动方程分别为_(1)=3times (10)^-2cos (10t+dfrac (3)(4)pi )SI，_(1)=3times (10)

10.-|||-两同方向同频率的简谐振动的振动方程为 _(1)=6cos (5t+dfrac (pi )(2)) (SI), _(2)=2cos (5t-dfr

一质点同时参与同方向的简谐振动，它们的振动方程分别为_(1)=0.1cos (omega t+dfrac (pi )(4)), _(1)=0.1cos (ome

两简谐振动的振动方程分别为_(1)=3cos (2pi t-dfrac (pi )(3)), _(2)=4cos (2pi t+dfrac (pi )(6))单

有两个振动方向相同的简谐振动,其振动方程分别为-|||-_(1)=10cos (2pi t+pi )cm, _(2)=10cos (2pi t+dfrac (p

已知一简谐振动_(1)=3cos (5t+dfrac (2)(3)pi ),另一个同方向简谐振动_(1)=3cos (5t+dfrac (2)(3)pi )若令